US20190120185A1 - Air intake assembly for motorcycle - Google Patents
Air intake assembly for motorcycle Download PDFInfo
- Publication number
- US20190120185A1 US20190120185A1 US16/220,639 US201816220639A US2019120185A1 US 20190120185 A1 US20190120185 A1 US 20190120185A1 US 201816220639 A US201816220639 A US 201816220639A US 2019120185 A1 US2019120185 A1 US 2019120185A1
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- US
- United States
- Prior art keywords
- filter element
- air intake
- intake assembly
- air
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000003570 air Substances 0.000 description 58
- 210000002414 leg Anatomy 0.000 description 6
- 239000012080 ambient air Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
- F02M35/048—Arranging or mounting on or with respect to engines or vehicle bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0204—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof for connecting or joining to other devices, e.g. pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0212—Multiple cleaners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
- F02M35/02416—Fixing, mounting, supporting or arranging filter elements; Filter element cartridges
- F02M35/02433—Special alignment with respect to the air intake flow, e.g. angled or in longitudinal flow direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10013—Means upstream of the air filter; Connection to the ambient air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10262—Flow guides, obstructions, deflectors or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
- F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present disclosure relates to motorcycles, and more particularly to an air intake assembly for a motorcycle.
- Conventional high-flow air intake assemblies for motorcycles may include a tubular conduit supporting an exposed cone filter.
- the tubular conduit extends from a side of a motorcycle and toward a rider's leg once the rider is positioned on the motorcycle.
- Such air intake assemblies may extend from the side of the motorcycle so as to interfere with a comfortable riding position for some riders.
- an air intake assembly in one aspect, includes a filter element and an intake conduit having a first end supporting the filter element.
- the first end forms an inlet opening having a first shape and a second end being adapted for attachment to an engine.
- the second end forms an outlet opening having a second shape different than the first shape of the inlet opening.
- the intake conduit also includes a body having an inner wall defining a passageway coupling the inlet and outlet openings.
- the inner wall has a maximum lateral dimension measured transverse to a central axis of the passageway within a plane that interests both the inlet and outlet openings. The maximum lateral dimension is located adjacent the outlet opening.
- an air intake assembly in another aspect, includes an air filter subassembly having a base end adapted to couple to an intake conduit.
- the air filter subassembly includes a first filter element having a front end and a rear end.
- the air filter subassembly also includes a velocity stack coupled to the rear end of the first filter element to inhibit relative movement between the velocity stack and the first filter element.
- the velocity stack includes an interior surface having an inlet opening and a non-circular outlet opening. The interior surface tapers from the inlet opening to the outlet opening.
- FIG. 1 is a side view of a motorcycle including an air intake assembly according to an embodiment of the disclosure.
- FIG. 2 is a top view of the motorcycle of FIG. 1 with a portion of the motorcycle in cross-section taken along 2 - 2 of FIG. 1 illustrating a rider's leg positioned adjacent the air intake assembly.
- FIG. 3 is an exploded view of the air intake assembly of FIG. 1 .
- FIG. 4 is an outlet end view of a conduit of the air intake assembly of FIG. 1 .
- FIG. 5 is an inlet end view of the conduit of FIG. 3 .
- FIG. 6 is a perspective view of an outlet end of a velocity stack subassembly of the air intake assembly of FIG. 3 .
- FIG. 7 is a perspective view of an inlet end of the velocity stack subassembly of FIG. 6 .
- FIG. 8 is an end view of the outlet end of the velocity stack subassembly of FIG. 6 .
- FIG. 9 is a cross-sectional view of the air intake assembly taken along 9 - 9 of FIG. 1 .
- FIG. 1 illustrates a motorcycle 10 including a drive assembly 14 , a frame 18 , a front fork assembly 22 , a swing arm or rear fork assembly 26 , a front wheel 30 , a rear wheel 34 , a seat 38 , and a fuel tank 42 .
- the motorcycle 10 defines a longitudinal or vertical plane 46 (e.g., parallel to a XY plane as best shown in FIGS. 1 and 2 ) extending between the front and rear wheels 30 , 34 and oriented substantially perpendicular to ground 50 that supports the motorcycle 10 when the motorcycle 10 is in an upright position as illustrated in FIG. 1 .
- the motorcycle 10 also defines a lateral or horizontal plane 54 (e.g., parallel to a XZ plane as best shown in FIG. 1 ) that intersects an air intake assembly 82 coupled to the motorcycle 10 , as discussed in more detail below.
- the horizontal plane 54 is oriented substantially parallel to the ground 50 when the motorcycle 10 is in the upright position.
- the front fork assembly 22 is pivotally coupled to the frame 18 at a front end of the motorcycle 10 and rotatably supports the front wheel 30 .
- the front fork assembly 22 includes a pair of handle bars 58 (only one handle bar 58 is shown in FIGS. 1 and 2 ) for steering the motorcycle 10 .
- the rear fork assembly 26 is coupled to the frame 18 at a rear end of the motorcycle 10 and rotatably supports the rear wheel 34 .
- the seat 38 and footrests 60 (e.g., foot pegs) are coupled to the frame 18 to support a rider 62 positioned on the motorcycle 10 ( FIG. 2 ).
- the fuel tank 42 is also coupled to the frame 18 and provides fuel to the drive assembly 14 .
- the drive assembly 14 is coupled to the frame 18 beneath the seat 38 between the front wheel 30 and the rear wheel 34 of the motorcycle 10 .
- the drive assembly 14 includes an internal combination engine 66 and a transmission 70 .
- the engine 66 is a V-twin engine including a first or front cylinder block 74 and a second or rear cylinder block 78 .
- the engine 66 is operable to drive the rear wheel 34 via the transmission 70 , for example at a plurality of different selectable speed ratios, in order to move the motorcycle 10 relative to the ground 50 .
- FIG. 1 An air intake assembly 82 is also illustrated in FIG. 1 that is selectively attached to the engine 66 with the horizontal plane 54 intersecting the air intake assembly 82 (e.g., at section line 8 - 8 ). Particularly, the air intake assembly 82 mounts to a lateral side of the engine 66 .
- the air intake assembly 82 includes a bracket 86 , a conduit 90 generally shaped as an oblique elbow, and an air filter subassembly 94 .
- the bracket 86 is mountable to the engine 66 ( FIGS. 1 and 2 ) via, for example, by two bolts and includes threaded bracket apertures 98 positioned around an engine air inlet port 102 of the bracket 86 .
- the bracket 86 can establish fluid communication for the air intake assembly 82 to a throttle body inlet (not shown) to provide throttled air for combustion in the engine 66 .
- the conduit 90 includes an outlet or first end 106 that interfaces with the bracket 86 , an inlet or second end 110 that interfaces with the air filter subassembly 94 , and a body 114 that extends between the outlet 106 and the inlet 110 .
- the illustrated outlet 106 includes an outlet flange 118 having a planar outlet flange surface 122 ( FIG. 4 ) that abuts the bracket 86 .
- the planar outlet flange surface 122 is substantially parallel to the vertical plane 46 of the motorcycle 10 .
- the outlet flange 118 —and ultimately the conduit 90 — is fixed to the bracket 86 by bracket fasteners 126 (e.g., bolts; FIG.
- the conduit 90 can be manufactured from carbon fiber, aluminum, or the like.
- a first bracket gasket 134 is positioned between the bracket 86 and the planar outlet flange surface 122 to provide an air-seal between the bracket 86 and the conduit 90
- a second bracket gasket 136 is positioned downstream of the bracket 86 to provide an air-seal between the bracket 86 and the engine 66 .
- the outlet 106 also includes an outlet opening 138 .
- the outlet opening 138 is circular-shaped and includes an outlet radius 142 of about 1.30 inches, which matches the geometry of the engine air inlet port 102 of the bracket 86 .
- the area of the outlet opening 138 is about 5.33 inches squared.
- the outlet radius 142 can be more or less than 1.30 inches, which will increase or decrease the area of the outlet opening 138 , respectively.
- the outlet opening 138 can be of different geometry (e.g., ellipse, square, rectangular, triangular, etc.).
- the inlet 110 includes an inlet opening 146 and an inlet flange 150 having a planar inlet flange surface 154 surrounding the inlet opening 146 .
- the illustrated planar inlet flange surface 154 is obliquely oriented relative to the planar outlet flange surface 122 .
- the planar inlet flange surface 154 is oriented at an oblique angle relative to the vertical and horizontal planes 46 , 54 .
- the planar inlet flange surface 154 can be oriented perpendicular to the planar outlet flange surface 122 .
- the inlet opening 146 is non-circular (e.g., ellipse-shaped) and includes a minor diameter or dimension 158 of about 2.43 inches and a major diameter or dimension 162 of about 3.53 inches. As such, the area of the inlet opening 146 is about 6.73 inches squared. In the illustrated embodiment, a ratio of the area of the inlet opening 146 over the area of the outlet opening 138 is about 1.26. In some embodiments, the area of the inlet opening 146 is plus or minus 20 percent of the area of the outlet opening 138 , and can be equal to the area of the outlet opening 138 in some constructions.
- the area of the inlet opening 146 may vary from the area of the outlet opening 138 by more than 20 percent, for example, by increasing or decreasing at least one of the minor dimension 158 and the major dimension 162 compared to the illustrated embodiment.
- the minor dimension 158 is a horizontal dimension of the inlet opening 146
- the major dimension 162 is a vertical dimension of the inlet opening 146 .
- the minor dimension 158 is oriented relative to the horizontal plane 54 at an angle less than about 6 degrees
- the major dimension 162 is oriented relative to the vertical plane 46 at an angle less than about 16 degrees ( FIG. 5 ).
- the minor dimension 158 can be perpendicular to the planar outlet flange surface 122 (e.g., parallel to the horizontal plane 54 ), and the major dimension 162 can be parallel to the planar outlet flange surface 122 (e.g., parallel to the vertical plane 46 ).
- the body 114 is curved and defines a central axis 166 extending between center points of the inlet 110 and the outlet 106 .
- the central axis 166 can be a 2-dimensional or 3-dimensional curve, and can have a constant curvature or different portions with different curvatures, including linear portions.
- the sharpest bend in the central axis 166 defined by the smallest radius, is positioned adjacent the outlet 106 or at least closer to the outlet 106 than the inlet 110 ( FIG. 9 ).
- no portion of the central axis 166 includes a bend greater than 90 degrees so that the central axis 166 does not include any sharp bends or curves between the inlet 110 and the outlet 106 .
- a first lateral dimension 167 of the body 114 is defined in the lateral plane 54 , transverse to the central axis 166 , in a portion of the body 114 adjacent the inlet 110 ( FIG. 9 ).
- a second lateral dimension 168 of the body 114 is defined in the lateral plane 54 , transverse to the central axis 166 , in another portion of the body that is adjacent the outlet 106 ( FIG. 9 ).
- the body 114 includes a first height dimension 169 ( FIG. 5 ) that is transverse to the lateral plane 54 and the central axis 166 at an axial location of the first lateral dimension 167 .
- the body 114 also includes a second height dimension 170 ( FIG. 4 ) that is transverse to the lateral plane 54 and the central axis 166 at an axial location of the second lateral dimension 168 .
- the first lateral dimension 167 is less than the second lateral dimension 168 and the first height dimension 169 is greater than the second height dimension 170 (e.g., the body 114 is an ellipse-shaped body adjacent the inlet opening 146 and transitions into a circular-shaped body adjacent the outlet opening 138 ).
- the inlet opening 146 includes a first shape (e.g., ellipse-shaped)
- the outlet opening 138 includes a second shape (e.g., circular-shaped)
- a portion of the body 114 between the inlet opening 146 and the outlet opening 138 has a different shape (e.g., ellipse-shaped) than the second shape of the outlet opening 138 .
- the inlet opening 146 and the outlet opening 138 can be the same shape (e.g., circular-shaped) with a portion of the body 114 between the inlet opening 146 and the outlet opening 138 being of a different shape (e.g., ellipse-shaped).
- the illustrated body 114 includes an outer surface 172 that defines an outside portion of the body 114 as the body 114 bends in the horizontal plane 54 away from the outlet 106 and toward the inlet 110 (e.g., the body 114 bends toward a front of the motorcycle 10 ).
- the body 114 also includes an inner surface 174 that defines an inside portion of the body 114 as the body 114 bends in the horizontal plane 54 . Accordingly, the inner surface 174 generally faces toward the engine 66 and the outer surface 172 generally faces away from the engine 66 .
- the outer surface 172 includes an apex or midpoint 178 within the horizontal plane 54 between the inlet 110 and the outlet 106 .
- the illustrated apex 178 is positioned at a distance 180 of less than 2.90 inches from the planar outlet flange surface 122 of the outlet 106 in a direction perpendicular to the planar outlet flange surface 122 ( FIG. 9 ).
- the distance 180 can be less than 2.50 inches or less than 2.00 inches.
- the distance 180 can be about 1.90 inches.
- a third lateral dimension 181 of the body 114 is defined in the lateral plane 54 , transverse to the central axis 166 and intersects the apex 178 ( FIG. 9 ).
- the body 114 also includes a third height dimension 183 ( FIG. 4 ) that is transverse to the lateral plane 54 and the central axis 166 at an axial location of the third lateral dimension 181 .
- the third lateral dimension 181 is less than the second lateral dimension 168 and the third height dimension 183 is greater than the second height dimension 170 .
- the air filter subassembly 94 includes a rear end cap 182 , a velocity stack 186 , a first filter element 190 , a front end collar 194 , a second filter element 198 , and an air-impermeable cap 202 .
- a total length 206 of the air filter subassembly 94 between the rear end cap 182 and the front end collar 194 is about 6.35 inches ( FIG. 9 ).
- the illustrated velocity stack 186 serves as a base or mount of the first filter element 190 for coupling the air filter subassembly 94 to the body 114 .
- the velocity stack 186 includes threaded velocity stack apertures 210 (e.g., four threaded velocity stack apertures 210 ).
- air filter subassembly fasteners 214 e.g., bolts; FIG. 3
- planar inlet flange surface 154 is oriented at an oblique angle relative to the vertical and horizontal planes 46 , 54 , which also orients the velocity stack 186 at the same oblique angle relative to the vertical and horizontal planes 46 , 54 .
- the velocity stack 186 also includes an ellipse-shaped groove 226 that receives an air filter subassembly gasket 230 .
- the air filter subassembly gasket 230 and a portion of the velocity stack 186 extend through a central opening 234 of the rear end cap 182 so that the velocity stack 186 , the air filter subassembly gasket 230 , and the rear end cap 182 abut the inlet flange 150 of the conduit 90 to provide an air-seal between the conduit 90 and the air filter subassembly 94 (e.g., the air filter subassembly gasket 230 is compressed between the velocity stack 186 and the conduit 90 by tightening the fasteners 214 ; FIG. 9 ).
- the air filter subassembly gasket 230 is compressed in an axial direction parallel to a longitudinal axis of each fastener 214 .
- the air filter subassembly gasket 230 can be formed as a rubber overmold on at least one of the rear end cap 182 and the velocity stack 186 .
- the rear end cap 182 and the velocity stack 186 can be formed as a single component.
- the rear end cap 182 and/or the velocity stack 186 can be manufactured from carbon fiber, cast aluminum, or the like.
- the velocity stack 186 also includes a channel 238 surrounding an interior or curved surface 242 of the velocity stack 186 that receives a rear end 246 of the first filter element 190 ( FIG. 9 ).
- the velocity stack 186 is fixedly coupled to the first filter element 190 so that there is no relative movement therebetween.
- the illustrated interior surface 242 includes an inlet end 250 and an opposing outlet end 254 with the interior surface 242 tapering from the inlet end 250 to the outlet end 254 (e.g., the inlet end 250 is larger than the outlet end 254 ).
- the outlet end 254 ( FIG. 6 ) is ellipse-shaped to interface with the inlet opening 146 of the conduit 90 .
- an interior surface of the ellipse-shaped outlet end 254 mates flush with an interior surface of the ellipse-shaped inlet 110 of the conduit 90 ( FIG. 9 ) so that there are no sharp curves or bends at the interface between the velocity stack 186 and the conduit 90 .
- a thickness 258 of the velocity stack 186 between the inlet and outlet ends 250 , 254 is about 0.837 inches ( FIG. 9 ).
- a ratio of the thickness 258 of the velocity stack 186 over the total length 206 of the air filter subassembly 94 is about 0.13.
- the outlet end 254 of the velocity stack 186 includes a center point 259 that is offset between opposing lateral sides 260 of the velocity stack 186 .
- the center point 259 is laterally spaced from the first side 260 of the velocity stack 186 (e.g., the side of the velocity stack 186 facing away from the motorcycle 10 ) at a first distance 261
- the center point 259 is laterally spaced from the second side 260 of the velocity stack 186 (e.g., the side of the velocity stack 186 facing toward the motorcycle 10 ) at a second distance 263 .
- the first distance 261 is smaller than the second distance 263 .
- the first filter element 190 tapers from the velocity stack 186 to the front end collar 194 with the front end collar 194 coupled to a front end 262 of the first filter element 190 (e.g., the rear end 246 of the first filter element 190 is larger than the front end 262 ).
- the velocity stack 186 is oriented at an oblique angle relative to the vertical and horizontal planes 46 , 54 ; however, the first filter element 190 is oriented at an oblique angle relative to the velocity stack 186 so that the first filter element 190 points in a forward direction of the motorcycle 10 , i.e., a direction parallel to the vertical and horizontal planes 46 , 54 ( FIG. 9 ).
- a front end 266 of the second filter element 198 is also coupled to the front end collar 194 .
- the second filter element 198 tapers from the front end collar 194 to the impermeable cap 202 so that the second filter element 198 extends into the first filter element 190 toward the velocity stack 186 .
- the impermeable cap 202 is positioned within the first filter element 190 and is coupled to a rear end 270 of the second filter element 198 (e.g., the front end 266 of the second filter element 198 is larger than the rear end 270 ).
- a length 274 of the second filter element 198 between the front end collar 194 and the impermeable cap 202 is about 2.63 inches ( FIG. 9 ). As such, a ratio of the length 274 of the second filter element 198 over the total length 206 of the air filter subassembly 94 is about 0.41.
- the illustrated air intake assembly 82 provides maximum clearance compared to a conventional air intake assembly (a portion of a conventional air intake assembly having a 90 degree bend is illustrated in broken lines within FIG. 9 ) for the rider's leg 282 (e.g., the rider's knee) so that the air intake assembly 82 does not impede a comfortable riding position of the rider 62 on the motorcycle 10 .
- the ellipse-shaped inlet 110 allows for the outer surface 172 of the conduit 90 to be positioned closer to the engine 66 (e.g., the front cylinder block 74 ) to provide more room for the rider's leg 282 adjacent the conduit 90 than a conventional air intake assembly.
- the apex 178 of the outer surface 172 is positioned at the distance 180 of less than 2.90 inches from the planar outlet flange surface 122 of the outlet 106 (compared to 2.90 inches of a conventional 90 degree bend air intake assembly), the air intake assembly 82 provides more room for the rider's leg 282 and the rider 62 can sit on the motorcycle 10 more comfortably.
- the air filter subassembly 90 can be positioned closer to the motorcycle 10 than if the center point 259 was centered between the opposing lateral sides 260 , which also increases leg room.
- ambient air 286 is sucked into the air filter subassembly 94 .
- the ambient air 286 travels through the first filter element 190 and the second filter element 198 ( FIG. 9 ) to inhibit foreign particles (e.g., dirt and debris) from entering into the air filter subassembly 94 .
- the filtered ambient air 286 passes through the velocity stack 186 to allow for the velocity stack 186 to transform the relatively turbulent ambient air 286 into a smooth and even air flow (e.g., laminar air flow) that enters into the conduit 90 .
- the velocity stack 186 mates flush with the conduit 90 , the laminar air flow is not disturbed by the interface between the air filter subassembly 94 and the conduit 90 .
- the laminar ambient air 286 then follows a flow path through the conduit 90 that moves substantially parallel to the central axis 166 from the inlet 110 to the outlet 106 before passing through the engine air inlet port 102 of the bracket 86 and entering the engine 66 .
- no portion of the central axis 166 includes a bend greater than 90 degrees, which impacts (e.g., decreases) a velocity of the airflow 286 traveling through the conduit 90 less than if the airflow 286 travels through the conventional 90 degree bend air intake assembly illustrated in FIG.
- a velocity of the airflow 286 through the conduit 90 is greater than a velocity of the airflow 286 through the conventional air intake assembly. Accordingly, the combination of the velocity stack 186 and the geometry of the conduit 90 provide an increased air flow performance compared to a conventional air intake assembly without impeding a riding position of the rider 62 on the motorcycle 10 .
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Automatic Cycles, And Cycles In General (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 15/711,025 filed Sep. 21, 2017, the entire contents of which are incorporated herein by reference.
- The present disclosure relates to motorcycles, and more particularly to an air intake assembly for a motorcycle.
- Conventional high-flow air intake assemblies for motorcycles may include a tubular conduit supporting an exposed cone filter. The tubular conduit extends from a side of a motorcycle and toward a rider's leg once the rider is positioned on the motorcycle. Such air intake assemblies may extend from the side of the motorcycle so as to interfere with a comfortable riding position for some riders.
- In one aspect, an air intake assembly includes a filter element and an intake conduit having a first end supporting the filter element. The first end forms an inlet opening having a first shape and a second end being adapted for attachment to an engine. The second end forms an outlet opening having a second shape different than the first shape of the inlet opening. The intake conduit also includes a body having an inner wall defining a passageway coupling the inlet and outlet openings. The inner wall has a maximum lateral dimension measured transverse to a central axis of the passageway within a plane that interests both the inlet and outlet openings. The maximum lateral dimension is located adjacent the outlet opening.
- In another aspect, an air intake assembly includes an air filter subassembly having a base end adapted to couple to an intake conduit. The air filter subassembly includes a first filter element having a front end and a rear end. The air filter subassembly also includes a velocity stack coupled to the rear end of the first filter element to inhibit relative movement between the velocity stack and the first filter element. The velocity stack includes an interior surface having an inlet opening and a non-circular outlet opening. The interior surface tapers from the inlet opening to the outlet opening.
- Other aspects of the disclosure will become apparent by consideration of the detailed description and accompanying drawings.
-
FIG. 1 is a side view of a motorcycle including an air intake assembly according to an embodiment of the disclosure. -
FIG. 2 is a top view of the motorcycle ofFIG. 1 with a portion of the motorcycle in cross-section taken along 2-2 ofFIG. 1 illustrating a rider's leg positioned adjacent the air intake assembly. -
FIG. 3 is an exploded view of the air intake assembly ofFIG. 1 . -
FIG. 4 is an outlet end view of a conduit of the air intake assembly ofFIG. 1 . -
FIG. 5 is an inlet end view of the conduit ofFIG. 3 . -
FIG. 6 is a perspective view of an outlet end of a velocity stack subassembly of the air intake assembly ofFIG. 3 . -
FIG. 7 is a perspective view of an inlet end of the velocity stack subassembly ofFIG. 6 . -
FIG. 8 is an end view of the outlet end of the velocity stack subassembly ofFIG. 6 . -
FIG. 9 is a cross-sectional view of the air intake assembly taken along 9-9 ofFIG. 1 . - Before any embodiments of the disclosure are explained in detail, it is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways.
-
FIG. 1 illustrates amotorcycle 10 including adrive assembly 14, aframe 18, afront fork assembly 22, a swing arm orrear fork assembly 26, afront wheel 30, arear wheel 34, aseat 38, and afuel tank 42. Themotorcycle 10 defines a longitudinal or vertical plane 46 (e.g., parallel to a XY plane as best shown inFIGS. 1 and 2 ) extending between the front andrear wheels ground 50 that supports themotorcycle 10 when themotorcycle 10 is in an upright position as illustrated inFIG. 1 . Themotorcycle 10 also defines a lateral or horizontal plane 54 (e.g., parallel to a XZ plane as best shown inFIG. 1 ) that intersects anair intake assembly 82 coupled to themotorcycle 10, as discussed in more detail below. In some embodiments, thehorizontal plane 54 is oriented substantially parallel to theground 50 when themotorcycle 10 is in the upright position. - The
front fork assembly 22 is pivotally coupled to theframe 18 at a front end of themotorcycle 10 and rotatably supports thefront wheel 30. Thefront fork assembly 22 includes a pair of handle bars 58 (only onehandle bar 58 is shown inFIGS. 1 and 2 ) for steering themotorcycle 10. Therear fork assembly 26 is coupled to theframe 18 at a rear end of themotorcycle 10 and rotatably supports therear wheel 34. Theseat 38 and footrests 60 (e.g., foot pegs) are coupled to theframe 18 to support arider 62 positioned on the motorcycle 10 (FIG. 2 ). Thefuel tank 42 is also coupled to theframe 18 and provides fuel to thedrive assembly 14. - With continued reference to
FIG. 1 , thedrive assembly 14 is coupled to theframe 18 beneath theseat 38 between thefront wheel 30 and therear wheel 34 of themotorcycle 10. Thedrive assembly 14 includes aninternal combination engine 66 and atransmission 70. Theengine 66 is a V-twin engine including a first orfront cylinder block 74 and a second orrear cylinder block 78. Theengine 66 is operable to drive therear wheel 34 via thetransmission 70, for example at a plurality of different selectable speed ratios, in order to move themotorcycle 10 relative to theground 50. - An
air intake assembly 82 is also illustrated inFIG. 1 that is selectively attached to theengine 66 with thehorizontal plane 54 intersecting the air intake assembly 82 (e.g., at section line 8-8). Particularly, theair intake assembly 82 mounts to a lateral side of theengine 66. With reference toFIGS. 2 and 3 , theair intake assembly 82 includes abracket 86, aconduit 90 generally shaped as an oblique elbow, and anair filter subassembly 94. Thebracket 86 is mountable to the engine 66 (FIGS. 1 and 2 ) via, for example, by two bolts and includes threadedbracket apertures 98 positioned around an engineair inlet port 102 of thebracket 86. Thebracket 86 can establish fluid communication for theair intake assembly 82 to a throttle body inlet (not shown) to provide throttled air for combustion in theengine 66. - As best shown in
FIG. 3 , theconduit 90 includes an outlet orfirst end 106 that interfaces with thebracket 86, an inlet orsecond end 110 that interfaces with theair filter subassembly 94, and abody 114 that extends between theoutlet 106 and theinlet 110. The illustratedoutlet 106 includes anoutlet flange 118 having a planar outlet flange surface 122 (FIG. 4 ) that abuts thebracket 86. In the illustrated embodiment, the planaroutlet flange surface 122 is substantially parallel to thevertical plane 46 of themotorcycle 10. Theoutlet flange 118—and ultimately theconduit 90—is fixed to thebracket 86 by bracket fasteners 126 (e.g., bolts;FIG. 3 ) extending throughoutlet flange apertures 130 of theoutlet 106 to engage the threadedbracket apertures 98. In some embodiments, theconduit 90 can be manufactured from carbon fiber, aluminum, or the like. In addition, afirst bracket gasket 134 is positioned between thebracket 86 and the planaroutlet flange surface 122 to provide an air-seal between thebracket 86 and theconduit 90, and asecond bracket gasket 136 is positioned downstream of thebracket 86 to provide an air-seal between thebracket 86 and theengine 66. - With reference to
FIG. 4 , theoutlet 106 also includes an outlet opening 138. In the illustrated embodiment, the outlet opening 138 is circular-shaped and includes anoutlet radius 142 of about 1.30 inches, which matches the geometry of the engineair inlet port 102 of thebracket 86. As such, the area of the outlet opening 138 is about 5.33 inches squared. In other embodiments, theoutlet radius 142 can be more or less than 1.30 inches, which will increase or decrease the area of the outlet opening 138, respectively. In further embodiments, theoutlet opening 138 can be of different geometry (e.g., ellipse, square, rectangular, triangular, etc.). - With reference to
FIG. 5 , theinlet 110 includes an inlet opening 146 and aninlet flange 150 having a planarinlet flange surface 154 surrounding the inlet opening 146. The illustrated planarinlet flange surface 154 is obliquely oriented relative to the planaroutlet flange surface 122. In other words, the planarinlet flange surface 154 is oriented at an oblique angle relative to the vertical andhorizontal planes inlet flange surface 154 can be oriented perpendicular to the planaroutlet flange surface 122. In the illustrated embodiment, theinlet opening 146 is non-circular (e.g., ellipse-shaped) and includes a minor diameter ordimension 158 of about 2.43 inches and a major diameter ordimension 162 of about 3.53 inches. As such, the area of theinlet opening 146 is about 6.73 inches squared. In the illustrated embodiment, a ratio of the area of the inlet opening 146 over the area of theoutlet opening 138 is about 1.26. In some embodiments, the area of theinlet opening 146 is plus or minus 20 percent of the area of theoutlet opening 138, and can be equal to the area of the outlet opening 138 in some constructions. In other embodiments, the area of theinlet opening 146 may vary from the area of theoutlet opening 138 by more than 20 percent, for example, by increasing or decreasing at least one of theminor dimension 158 and themajor dimension 162 compared to the illustrated embodiment. In the illustrated embodiment, theminor dimension 158 is a horizontal dimension of theinlet opening 146, and themajor dimension 162 is a vertical dimension of theinlet opening 146. In particular, theminor dimension 158 is oriented relative to thehorizontal plane 54 at an angle less than about 6 degrees, and themajor dimension 162 is oriented relative to thevertical plane 46 at an angle less than about 16 degrees (FIG. 5 ). In other embodiments, theminor dimension 158 can be perpendicular to the planar outlet flange surface 122 (e.g., parallel to the horizontal plane 54), and themajor dimension 162 can be parallel to the planar outlet flange surface 122 (e.g., parallel to the vertical plane 46). - With reference to
FIGS. 4, 5, and 9 , thebody 114 is curved and defines acentral axis 166 extending between center points of theinlet 110 and theoutlet 106. Thecentral axis 166 can be a 2-dimensional or 3-dimensional curve, and can have a constant curvature or different portions with different curvatures, including linear portions. In the illustrated embodiment, the sharpest bend in thecentral axis 166, defined by the smallest radius, is positioned adjacent theoutlet 106 or at least closer to theoutlet 106 than the inlet 110 (FIG. 9 ). However, no portion of thecentral axis 166 includes a bend greater than 90 degrees so that thecentral axis 166 does not include any sharp bends or curves between theinlet 110 and theoutlet 106. - With continued reference to
FIGS. 4, 5, and 9 , when theconduit 90 is arranged so that thelateral plane 54 intersects both the inlet opening 146 (i.e., the center point of the inlet opening 146 as illustrated inFIG. 9 ) and theoutlet opening 138, a firstlateral dimension 167 of thebody 114 is defined in thelateral plane 54, transverse to thecentral axis 166, in a portion of thebody 114 adjacent the inlet 110 (FIG. 9 ). Likewise, a secondlateral dimension 168 of thebody 114 is defined in thelateral plane 54, transverse to thecentral axis 166, in another portion of the body that is adjacent the outlet 106 (FIG. 9 ). Furthermore, thebody 114 includes a first height dimension 169 (FIG. 5 ) that is transverse to thelateral plane 54 and thecentral axis 166 at an axial location of the firstlateral dimension 167. Thebody 114 also includes a second height dimension 170 (FIG. 4 ) that is transverse to thelateral plane 54 and thecentral axis 166 at an axial location of the secondlateral dimension 168. Because theinlet opening 146 is ellipse-shaped and theoutlet opening 138 is circular-shaped, the firstlateral dimension 167 is less than the secondlateral dimension 168 and thefirst height dimension 169 is greater than the second height dimension 170 (e.g., thebody 114 is an ellipse-shaped body adjacent theinlet opening 146 and transitions into a circular-shaped body adjacent the outlet opening 138). In the illustrated embodiment, theinlet opening 146 includes a first shape (e.g., ellipse-shaped), theoutlet opening 138 includes a second shape (e.g., circular-shaped), and a portion of thebody 114 between theinlet opening 146 and theoutlet opening 138 has a different shape (e.g., ellipse-shaped) than the second shape of theoutlet opening 138. In other embodiments, theinlet opening 146 and theoutlet opening 138 can be the same shape (e.g., circular-shaped) with a portion of thebody 114 between theinlet opening 146 and theoutlet opening 138 being of a different shape (e.g., ellipse-shaped). - With continued reference to
FIG. 9 , the illustratedbody 114 includes anouter surface 172 that defines an outside portion of thebody 114 as thebody 114 bends in thehorizontal plane 54 away from theoutlet 106 and toward the inlet 110 (e.g., thebody 114 bends toward a front of the motorcycle 10). Thebody 114 also includes aninner surface 174 that defines an inside portion of thebody 114 as thebody 114 bends in thehorizontal plane 54. Accordingly, theinner surface 174 generally faces toward theengine 66 and theouter surface 172 generally faces away from theengine 66. In the illustrated embodiment, theouter surface 172 includes an apex ormidpoint 178 within thehorizontal plane 54 between theinlet 110 and theoutlet 106. The illustratedapex 178 is positioned at adistance 180 of less than 2.90 inches from the planaroutlet flange surface 122 of theoutlet 106 in a direction perpendicular to the planar outlet flange surface 122 (FIG. 9 ). In other embodiments, thedistance 180 can be less than 2.50 inches or less than 2.00 inches. For example, thedistance 180 can be about 1.90 inches. Furthermore, when theconduit 90 is arranged so that thelateral plane 54 intersects both theinlet opening 146 and the outlet opening 138 (FIG. 9 ), a thirdlateral dimension 181 of thebody 114 is defined in thelateral plane 54, transverse to thecentral axis 166 and intersects the apex 178 (FIG. 9 ). Thebody 114 also includes a third height dimension 183 (FIG. 4 ) that is transverse to thelateral plane 54 and thecentral axis 166 at an axial location of the thirdlateral dimension 181. The thirdlateral dimension 181 is less than the secondlateral dimension 168 and thethird height dimension 183 is greater than thesecond height dimension 170. - With reference to
FIG. 3 , theair filter subassembly 94 includes arear end cap 182, avelocity stack 186, afirst filter element 190, afront end collar 194, asecond filter element 198, and an air-impermeable cap 202. In the illustrated embodiment, atotal length 206 of theair filter subassembly 94 between therear end cap 182 and thefront end collar 194 is about 6.35 inches (FIG. 9 ). The illustratedvelocity stack 186 serves as a base or mount of thefirst filter element 190 for coupling theair filter subassembly 94 to thebody 114. In particular, thevelocity stack 186 includes threaded velocity stack apertures 210 (e.g., four threaded velocity stack apertures 210). Thevelocity stack 186 and therear end cap 182—and ultimately theair filter subassembly 94—is selectively coupled to theconduit 90 by air filter subassembly fasteners 214 (e.g., bolts;FIG. 3 ) extending throughinlet flange apertures 218 of theinlet flange 150 and rearend cap apertures 222 of therear end cap 182 to engage the threadedvelocity stack apertures 210. As described above, the planarinlet flange surface 154 is oriented at an oblique angle relative to the vertical andhorizontal planes velocity stack 186 at the same oblique angle relative to the vertical andhorizontal planes velocity stack 186 also includes an ellipse-shapedgroove 226 that receives an airfilter subassembly gasket 230. With reference toFIG. 6 , the airfilter subassembly gasket 230 and a portion of thevelocity stack 186 extend through acentral opening 234 of therear end cap 182 so that thevelocity stack 186, the airfilter subassembly gasket 230, and therear end cap 182 abut theinlet flange 150 of theconduit 90 to provide an air-seal between theconduit 90 and the air filter subassembly 94 (e.g., the airfilter subassembly gasket 230 is compressed between thevelocity stack 186 and theconduit 90 by tightening thefasteners 214;FIG. 9 ). In particular, the airfilter subassembly gasket 230 is compressed in an axial direction parallel to a longitudinal axis of eachfastener 214. In other embodiments, the airfilter subassembly gasket 230 can be formed as a rubber overmold on at least one of therear end cap 182 and thevelocity stack 186. In further embodiments, therear end cap 182 and thevelocity stack 186 can be formed as a single component. In some embodiments, therear end cap 182 and/or thevelocity stack 186 can be manufactured from carbon fiber, cast aluminum, or the like. - As best shown in
FIG. 7 , thevelocity stack 186 also includes achannel 238 surrounding an interior orcurved surface 242 of thevelocity stack 186 that receives arear end 246 of the first filter element 190 (FIG. 9 ). In particular, thevelocity stack 186 is fixedly coupled to thefirst filter element 190 so that there is no relative movement therebetween. The illustratedinterior surface 242 includes aninlet end 250 and an opposingoutlet end 254 with theinterior surface 242 tapering from theinlet end 250 to the outlet end 254 (e.g., theinlet end 250 is larger than the outlet end 254). The outlet end 254 (FIG. 6 ) is ellipse-shaped to interface with the inlet opening 146 of theconduit 90. In other words, an interior surface of the ellipse-shapedoutlet end 254 mates flush with an interior surface of the ellipse-shapedinlet 110 of the conduit 90 (FIG. 9 ) so that there are no sharp curves or bends at the interface between thevelocity stack 186 and theconduit 90. In the illustrated embodiment, athickness 258 of thevelocity stack 186 between the inlet and outlet ends 250, 254 is about 0.837 inches (FIG. 9 ). As such, a ratio of thethickness 258 of thevelocity stack 186 over thetotal length 206 of theair filter subassembly 94 is about 0.13. - As best shown in
FIG. 8 , theoutlet end 254 of thevelocity stack 186 includes acenter point 259 that is offset between opposinglateral sides 260 of thevelocity stack 186. In particular, thecenter point 259 is laterally spaced from thefirst side 260 of the velocity stack 186 (e.g., the side of thevelocity stack 186 facing away from the motorcycle 10) at afirst distance 261, and thecenter point 259 is laterally spaced from thesecond side 260 of the velocity stack 186 (e.g., the side of thevelocity stack 186 facing toward the motorcycle 10) at asecond distance 263. In the illustrated embodiment, thefirst distance 261 is smaller than thesecond distance 263. - With reference to
FIG. 9 , thefirst filter element 190 tapers from thevelocity stack 186 to thefront end collar 194 with thefront end collar 194 coupled to afront end 262 of the first filter element 190 (e.g., therear end 246 of thefirst filter element 190 is larger than the front end 262). As described above, thevelocity stack 186 is oriented at an oblique angle relative to the vertical andhorizontal planes first filter element 190 is oriented at an oblique angle relative to thevelocity stack 186 so that thefirst filter element 190 points in a forward direction of themotorcycle 10, i.e., a direction parallel to the vertical andhorizontal planes 46, 54 (FIG. 9 ). Afront end 266 of thesecond filter element 198 is also coupled to thefront end collar 194. In contrast, thesecond filter element 198 tapers from thefront end collar 194 to theimpermeable cap 202 so that thesecond filter element 198 extends into thefirst filter element 190 toward thevelocity stack 186. As a result, theimpermeable cap 202 is positioned within thefirst filter element 190 and is coupled to arear end 270 of the second filter element 198 (e.g., thefront end 266 of thesecond filter element 198 is larger than the rear end 270). In the illustrated embodiment, alength 274 of thesecond filter element 198 between thefront end collar 194 and theimpermeable cap 202 is about 2.63 inches (FIG. 9 ). As such, a ratio of thelength 274 of thesecond filter element 198 over thetotal length 206 of theair filter subassembly 94 is about 0.41. - With reference to
FIG. 2 , once therider 62 mounts themotorcycle 10 and the rider'sfoot 278 is positioned on the correspondingfootrest 60, the illustratedair intake assembly 82 provides maximum clearance compared to a conventional air intake assembly (a portion of a conventional air intake assembly having a 90 degree bend is illustrated in broken lines withinFIG. 9 ) for the rider's leg 282 (e.g., the rider's knee) so that theair intake assembly 82 does not impede a comfortable riding position of therider 62 on themotorcycle 10. The ellipse-shapedinlet 110 allows for theouter surface 172 of theconduit 90 to be positioned closer to the engine 66 (e.g., the front cylinder block 74) to provide more room for the rider'sleg 282 adjacent theconduit 90 than a conventional air intake assembly. For example, because the apex 178 of theouter surface 172 is positioned at thedistance 180 of less than 2.90 inches from the planaroutlet flange surface 122 of the outlet 106 (compared to 2.90 inches of a conventional 90 degree bend air intake assembly), theair intake assembly 82 provides more room for the rider'sleg 282 and therider 62 can sit on themotorcycle 10 more comfortably. In addition, because thecenter point 259 of thevelocity stack 186 is offset between opposinglateral sides 260 of thevelocity stack 186, theair filter subassembly 90 can be positioned closer to themotorcycle 10 than if thecenter point 259 was centered between the opposinglateral sides 260, which also increases leg room. - As the
motorcycle 10 operates (e.g., theengine 66 is running),ambient air 286 is sucked into theair filter subassembly 94. In particular, theambient air 286 travels through thefirst filter element 190 and the second filter element 198 (FIG. 9 ) to inhibit foreign particles (e.g., dirt and debris) from entering into theair filter subassembly 94. Thereafter, the filteredambient air 286 passes through thevelocity stack 186 to allow for thevelocity stack 186 to transform the relatively turbulentambient air 286 into a smooth and even air flow (e.g., laminar air flow) that enters into theconduit 90. In addition, because thevelocity stack 186 mates flush with theconduit 90, the laminar air flow is not disturbed by the interface between theair filter subassembly 94 and theconduit 90. The laminarambient air 286 then follows a flow path through theconduit 90 that moves substantially parallel to thecentral axis 166 from theinlet 110 to theoutlet 106 before passing through the engineair inlet port 102 of thebracket 86 and entering theengine 66. As described above, no portion of thecentral axis 166 includes a bend greater than 90 degrees, which impacts (e.g., decreases) a velocity of theairflow 286 traveling through theconduit 90 less than if theairflow 286 travels through the conventional 90 degree bend air intake assembly illustrated inFIG. 9 (e.g., a velocity of theairflow 286 through theconduit 90 is greater than a velocity of theairflow 286 through the conventional air intake assembly). Accordingly, the combination of thevelocity stack 186 and the geometry of theconduit 90 provide an increased air flow performance compared to a conventional air intake assembly without impeding a riding position of therider 62 on themotorcycle 10. - Various features and advantages of the disclosure are set forth in the following claims.
Claims (19)
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US16/220,639 US10767608B2 (en) | 2017-09-21 | 2018-12-14 | Air intake assembly for motorcycle |
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US15/711,025 US10167825B1 (en) | 2017-09-21 | 2017-09-21 | Air intake assembly for motorcycle |
US16/220,639 US10767608B2 (en) | 2017-09-21 | 2018-12-14 | Air intake assembly for motorcycle |
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US15/711,025 Continuation US10167825B1 (en) | 2017-09-21 | 2017-09-21 | Air intake assembly for motorcycle |
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JP2022155492A (en) * | 2021-03-30 | 2022-10-13 | ダイハツ工業株式会社 | Engine intake device |
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WO2017156174A1 (en) * | 2016-03-08 | 2017-09-14 | K&N Engineering, Inc. | Aircharger air intake system and method |
US10167825B1 (en) | 2017-09-21 | 2019-01-01 | Harley-Davidson Motor Company Group, LLC | Air intake assembly for motorcycle |
US20210246855A1 (en) * | 2020-02-09 | 2021-08-12 | Velossa Tech Engineering Inc. | Interchangeable intake manifold assemblies |
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US10167825B1 (en) | 2019-01-01 |
US10767608B2 (en) | 2020-09-08 |
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